Comparison of Five-Level Voltage-Source Inverter Based STATCOMs

Author

Lauttamus, P. ; Tuusa, H.

Author_Institution

Tampere Univ. of Technol., Tampere

fYear

2007

fDate

2-5 April 2007

Firstpage

659

Lastpage

666

Abstract

This paper studies the utilization of multilevel inverters in Flexible AC Transmission Systems controllers and, in particular, as static synchronous compensators (STATCOMs). Three different STATCOM technologies based on five-level inverters, namely diode-clamped (or neutral-point clamped), cascaded and hybrid multilevel inverter, are examined and compared. Along with the circuit-level comparison also the compensation performance and power losses are investigated by means of computer simulations. The operation of the STATCOMs is simulated in different load conditions and also measurement data taken from an electric arc furnace is simulated. The results of the comparison show that the differences in the main circuit layouts affect the power loss distribution and the usability of the compensators for unbalanced load compensation.

Keywords

flexible AC transmission systems; invertors; static VAr compensators; Flexible AC Transmission Systems controllers; STATCOM; cascaded inverter; circuit-level comparison; compensation performance; diode-clamped inveter; electric arc furnace; five-level voltage-source inverter; hybrid multilevel inverters; neutral-point inverter; power losses; static synchronous compensators; Automatic voltage control; Circuit simulation; Computational modeling; Computer simulation; Control systems; Diodes; Electric variables measurement; Flexible AC transmission systems; Inverters; Performance loss; FACTS; Multilevel inverters; STATCOM;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Conversion Conference - Nagoya, 2007. PCC '07

Conference_Location

Nagoya

Print_ISBN

1-4244-0844-X

Electronic_ISBN

1-4244-0844-X

Type

conf

DOI

10.1109/PCCON.2007.373036

Filename

4239226